common/build.gradle

@@ -0,0 +1,10 @@
+dependencies {
+    implementation 'org.springframework:spring-web'
+    implementation 'com.fasterxml.jackson.core:jackson-databind'
+    implementation 'org.apache.httpcomponents.client5:httpclient5'
+
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+}

common/src/main/java/com/hithomelabs/common/config/RestTemplateConfig.java

@@ -0,0 +1,22 @@
+package com.hithomelabs.common.config;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+
+    @Bean
+    public RestTemplate restTemplate() {
+        RestTemplate restTemplate = new RestTemplate();
+        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
+        converter.setObjectMapper(new ObjectMapper().enable(SerializationFeature.WRAP_ROOT_VALUE).setSerializationInclusion(JsonInclude.Include.NON_NULL));
+        restTemplate.getMessageConverters().add(0, converter);
+        return restTemplate;
+    }
+}